1. Backup your data first if you can. 2. Have you tried a different Ubuntu/Linux boot CD/live CD? 3...etc. If you have a second drive that you can make primary, just attach your current drive to investigate and recover. You can re-jigger your partitions from windows if you have to, but I'd do that as a last resort.
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belacqJan 26 '11 at 2:29

Sounds like a hardware problem or bad burn. But you should be able to make Windows boot Linux by using 'dd' for Windows (http://www.chrysocome.net/dd). Boot Windows; install dd, run a command prompt and ...